Grease interciptor



Aug; 16, 1949. MATHEIS GREASE INTERCEPTOH Filed April 12, 1945 INVENTOR. AARON MATH EIS.

Patented Aug. 16, 1949 Aarom Matheis; Michigan city, 11111,. Jiosanrl Manufacturing Company,

assignor. to Cleveland,

7 Ohio, as comomtiona of-Delaware Application Apriilz, 1945;..SedatNm58t9W 2' Glaims.

The= presenti invention relat'esto a grease inter ceptor; or-the like, for removing grease or otli from waste water.

Anzobjecti of the present inventionuisao provide aegreaseainterceptor ofthescontinuousfiow type; in which the grease and other wast'emateriaFmay tie-easily removed fromathe interceptoi' at any desired: times whilamaintaining: normal: new: open ation-of thezintercepton Another ohjectlof the-.einventionx is R170; provid'eza grease: interceptor? in which; the grease may be easily. removedi during *normal operatiom thereof and in the-eventaof an abnormallfiowzofi'waste water into: the interceptor duringthe-' grease: removing operation, the interceptor can be -quickly returned to condition to accommodate such-ab normal flow.

other objects and. advantages: on thednwention willhe: apparentfrom the following'demtriptioraof a preferreri form of the invention; ref erencehei'ng had totheaccompanying drawings wherein-z" Fig: 1" is: a longitudinal sectional View of as grease interceptor embodying myinvention;

Fig. 2 is a top plan viewof'the interceptor Fig. 3' is-aside view inelevation' of-a valve employed in carrying out myinventitmy and Fig: b is-avierr-imel'evation of a valve plate.

Referring to the drawings, a heavy dutyggreas interceptor 5 of the. continuous flow, type 13 shown, which interceptor is. particularly adapt: able for use in .separatinggreases andother waste material; from the, waste. water of. slaughter.- houses, packing. houses, food. processing, plants andi'similar institutions whereheavy. greaseladen, wastewaterandidrainage is discharged. tothe sewer fines. Inc-general. the interceptor: comeprises a. separatingchamber into: which'the waste water flows and. wherein the grease and other lightdensity materials rise toithe 1 surf ace? ot the water. in the chamber during the continuousflow: of.- the hurdenec'twater; Theohamber: is providedc with outietr connected. with the: lower part; 0%:

the chamber throughv a trap leg so: that the .olarifled water may flow out of the chamber anttinto the sewage system. In separators of this type the static; water," level in the separating chamber varies in accordance with the amount of separated greaseapreserrt in: chamber stock plates; welded; together.-

2 amhit the-grease. accumulationfbecomesexcessive water; flowing througta thev separator will cause the: escape of: the; accumama grease into the outletmitheoevica .Imordertoremovertheaccumulateci grease; and

waste material; from. the surfiaoe of. the imthe chamhera-xskimming trough: extends; into the chamber anti; has an: open. ends thereof;- ifisposedl above the normal; leviet ofithe liquids and: on a line appmximately in i a horizontatpl'ane exetemii'ng throughthe: top edzgeorith e outlet or? the chamber. The bodyof accumulated grease is eievasted' by effecting a raising of the prevailing water revel-in the separating chamber, thus rais ing" the: grease level. The liquid level in the chamber may; be raised by-a gate-member is: arranted to be adfjustabl-y,positionedtransverse I'y of the outlet of. the chamber so that thejliquid level in the chamber mayhe raised. asdesi'red, thereby causing the accumulated grease to flow throughthetronghand out ofithevchambenwhiie avoidingthe. escape of, waste, Water with, the, rease; The gate member, isincapableoi come pletely. shutting ofi the wastewater. flow through. the. outletmi thechamber and. water. may flow oven. the tog thereoi. when. itisin its closed. posi'e tion so that. removal of the accumulatea -rease mayo-take place during waste water discharging gor-iodato; the interceptor. In the event. thatan abnormal: drainage flow should. occur during the skimming ogeration the valve may be quickly manipulated; to the: tally. open. position" so that; thee may: accommodate such abnormat fiowwitlzrout causingthe waste water totclischarge through the grease skimming trough.

Imthe formeoi theinvention shown, the inter- (1691301? iris preferably formeriofi; a rectanguiarly openrtop tank: 5 whiclrmay beaforinect of The tank includes: an inlet openingt'l atone arm and at theaoppositei' a leg: trap 8=is= formed: by; a. verticaltube: 9 which Is: in? communication; witir the" tank; 6'? through an opening It at the bottom of the tank.

'flhe upperrendf'ot tiie tubeza'is turned in: whorizorrtal direction. and; formsan outlet: H2, and a valve. mechanism. l Zismoontedi orr. thehorizontarf section. its may he: seen by the. line A- 011 the drawings, the lower edge of "the ho'r-izonta1 portion ofitim S te in the samehorizontai plane as the lower edge of the inlet 1, although it may be below this plane, if desired.

The bottom of the tank 6 has cascades i4 and a channel |5 formed therein for producing a desirable action of the drain water emptied into the tank. Also, a series of transversely extending bafifles l6 are provided in the tank for causing a more rapid separation of grease from the liquid in the tank. An opening 2!] is formed in both sides of the tank 6 adjacent one end and the top thereof, and an open-end trough 2| extends through one of the openings and into the tank while the opening 20 on the other side is closed with a plate 2 la, a water-tight gasket, not shown, being interposed between the plate and tank wall. Preferably, the trough is flared at 22 and the lower lip 23 of the trough opening is disposed slightly below the upper edge of the outlet .opening I l, as may be seen by line B. The outer end of the trough 2| is adapted to discharge into a suitable grease collecting container, not shown.

The valve mechanism l2 comprises a casing 25 having a tubular inlet opening 26 which is mounted over the open end H of the tube 9 and an outlet 21 which is adapted to be connected with a sewer system, not shown. Preferably, the outlet 21 is the same size as the inlet 1|. The bottom wall 28 of the casing is disposed below the lower edge of the inlet 26, and adjacent the lower edge of the inlet a rectangular valve plate 29 is pivoted by a pin 30 extending through and secured in bored lugs 30a, formed at the bottom of the plate. The valve plate 29 is adapted to substantially block the inlet 26, but allowing some water flow thereabout. The pin 30 is Journalled at opposite ends in openings in the wall of the casing I2, and one end of the pin extends through the wall of the casing and a quadrant 3| is fixedly attached to the pin. Suitable packing, not shown, is provided in the opening through the casing and about the pin for preventing leakage. The quadrant 3|, which may be formed of a metallic plate, includes a handle 32 and a 90 arcuate slot 33 is formed in the quadrant. Preferably, the handle 32 lies in a plane common to the plane of the face of the plate 29 so that the position of the plate 29 can be readily ascertained by noting the position of handle 32. The quadrant 3| may be locked in any desired position by the frictional engagement thereof by wing nut 34 threaded on a pin 35 extending through the slot 33 and anchored in the wall of the casing. The lower end of slot 33 and the pin 35 limit movement of the plate 21 toward the outlet of the tank 6 so that water may always flow over the top of the plate, although the plate is in the closed position. Preferably, the quadrant may be removable from the pin so that it can be secured to the opposite end of the pin on the opposite side of the valve, if desired.

Preferably, the top of the casing 25 has an opening which is normally closed by a plate 36 secured over the opening by bolts 31. Thus, access may be had to the valve mechanism through the opening in the top of the casing.

During the normal operation of the interceptor the liquid level in the tank 6 will be that indicated by line A, i. e., even with the lower edge of outlet I or slightly above this level during the time waste water is emptied into the tank.. The valve plate 29 is normally in the open position as shown in Fig. 1 in full lines and a free discharge through the opening I! may be had. During this time the liquid level will be well begate valve 4 low the level of the bottom of the trough 2|. When it is desirable to remove the grease and other waste material from the tank, the valve plate 29 is raised about the pivot pin 3|! by the handle 32 so that considerable restriction is provided at the outlet thereby causing the level in the tank 6 to rise. It will be noted by reference to Fig. 3 that when the valve member 29' is in its raised position, as indicated at C, liquid may flow over the top of the valve member. The raising of the liquid level will cause the grease to flow out through the trough 2| and into a suitable container. The Waste material may also be removed by a paddle or hoe through the 'trough 2| should the consistency thereof be sluggish.

In the event an abnormal surge of drainage is emptied into the tank 6, the operator may quickly release the wing nut 34 and the valve 29 will fall to its open position before the level of the liquid rises to the point where it would flow through the trough 2|.

Thus, it is apparent that I have provided a grease interceptor from which the grease and waste may be removed without the necessity of closing oil the interceptor. Also, during the cleaning operation, the interceptor may be quickly rendered efiective to handle abnormal flows without spilling over into the grease collection container.

I am aware of prior efforts to remove grease from a grease separating chamber by causing an elevation of the prevailing water level in the separating chamber by closing the separator outlet and partially closing the inlet. However, such attempts have resulted in the necessity of providing a by-pass conduit or another interceptor unit to take care of excess inflow and which was discharged to the sewer line with its grease burden.

I claim:

1. A grease interceptor including a waste water chamber having an inlet in the upper portion thereof, a discharge passage leading from the lower portion of the chamber upwardly and discharging at a level to maintain a substantial body of liquid in the chamber, a valve casing carried by the wall of the chamber and having an inlet for receiving the discharge from said passage, a pivoted in said casing and movable toward and away from the end of said discharge passage to control the flow therethrough, manually operated means on the exterior of said chamber for actuating said gate and means for limiting movement of said valve toward closing position so that the valve may not be completely closed, and an open ended skimming trough member having a flared mouth extending into normal liquid level in the chamber.

2. A grease interceptor as claimed in claim 1 in which said limiting means comprises a plate secured to said pivot exteriorly of the chamber, and is provided with an arcuate slot, and a pin on said chamber wall extending through said engaging an end thereof to stop the movement of the valve before it is completely closed.

AARON MATHEIS.

(References on following page) REFERENCES CITED The following references are of record in the file of this patent:

Number UNITED STATES PATENTS Name Date Anderson Feb. 13, 1872 Franke Sept. 7, 1875 Slaney Sept. 28, 1875 Oliver Jan. 5, 1904 Coryell et a1. Apr. 18, 1905 Maranville Feb. 2, 1909 Collar Apr. 15, 1913 Mann et a1 May 5, 1914 Number Number 10 9,770 505,300 448,721 17,079

Name Date Linden June 24, 1919 Dean Mar, 22, 1932 Coombs Apr. 18, 1933 Loeb Nov. 26, 1935 Durdin Jan. 9, 1940 FOREIGN PATENTS Country Date Great Britain 1913 Great Britain May 9, 1939 Germany Aug. 23, 1927 Sweden Feb. 13, 1904 

